Electrically-heated radiator.



P. KUHN.

BLEGTRIGALLY HEATED RADIATOR.

APPLICATION FILED MAR. 25, 1913.

Patented Aug. 18, 1914 9 4 as (D D fn/Yengr c wrawwwi w FRANK KUHN, OF DETROIT, MICHIGAN.

ELECTRICALLY-HEATED RADIATOR.

Specification of Letters Patent.

Application filed March 25, 1913.

Patented Aug. 18, 1914. Serial No. 756,698.

To on whom it may concern:

Be it known that I, F RANK KUHN, a citizen of the United States of America, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Electrically-Heated Ixadiators, of which the fol lowing is a specification, reference being had therein to the accompanying drawings.

vThe invention relates to electric heaters particularly designed for warming the air of a room, and the invention consists in the construction as hereinafter set forth.

In the drawings: Figure 1 is a perspective view of the radiator; Fig. 2 is a cross section thereof; and Fig. 3 is a fragmentary perspective view of the insulator boards on the base member.

A is a base member preferably formed of cast metal, and provided at its opposite ends with leg members B preferably integral therewith. Centrally of one of the sides of the member A is a switch-mounting C, and upon the opposite side is a strap D for securing a connector terminal box E. Above the base A is a hollow sheet metal body F surmounted by a perforated cap member G, these members being secured to each other by suitable means such as the bolts H.

The electrical heating element is preferably detachably secured to the base A so as to project upward into the body F. This unit preferably comprises a plurality of parallelly-arranged flat insulator boards G, which are mounted upon a cast metal base member H. The plates G are spaced from each other and braced by cross ties I, while the edges of the plates are preferably bound and reinforced by metallic strips J. K resistor coils which are mounted. upon the plates G by being threaded into engagement with series of perforations in said plates. The ends of the resistor coils are connected to terminal binding posts L, which posts are suitably connected to the controlling switch so that the current through the coils may be regulated. The base member H for the unit may be bolted or otherwise secured to the base member A,

which latter is cut out in the center for the insertion of the unit into the body F.

The heater formed as described may be cheaply manufactured, and is perfectly safe-as the resistor coils are securely held from displacement and are completely inclosed in a metal jacket. Insulator blocks M are preferably mounted at the opposite ends of the cast metal base H for supporting the plates G and also forming mountings for the end terminals N which are attached to the switch. Intermediate these blocks, upwardly-extending cast metal lugs O on the member H serve to support the plates Gr, said lugs being preferably notched to engage said plates and hold them from lateral movement.

\Vhat 1 claim as my invention is:

1. An electrical heat radiator, comprising a hollow sheet metal jacket, a centrally apertured base plate for supporting said jacket having integral legs, a switch supporting portion and a connector terminal box supporting portion, a unit comprising parallelly-arranged boards of insulating material spaced from each other, cross ties for connecting and bracing said boards, resistor coils threaded into engagement with perforations in said boards, a metallic base on which said boards are mounted adapted to be detachably secured to the base of said jacket, a switch mounted on said unit base, and connections between said switch and resistor coils.

2. All electrical heat radiator, comprising a hollow sheet metal jacket, a base plate for supporting said jacket, a heating unit comprising parallellyarranged boards of insulating material spaced from each other,-

cross-ties for connecting and bracing said boards, a metal base mounted upon said base plate, insulator blocks supporting the boards mounted at opposite ends of said metal. base, notched upwardly-extending lugs intermediate said blocks engaging said insulator boards, and resistor coils mounted upon said boards.

3. An electrical heat radiator, comprising a hollow sheet metal jacket, a base member 03 supporting seioi jeokeis, seifl. member be In testimo y whereof I my signature w ing eemomily eyei uured, a, heating unit in in of "We Witnesses eertibie through seidl aperture, comprising aplumlity of comparatively narrow flat per- FRAN LKUHNQ allelly-zu rengedl insulator boards secured in spaced relation to each other, ab-bese plate on WViinesees:

which said boards are moumbeoi, and means JAMES P. BARRY, for d6tLChb1y securing said-hose plate me W1 FUBDD "the base member. 

